Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
972 views
in Technique[技术] by (71.8m points)

怎么修改表的列名

请教一个问题,这样一个table,在第三列列名不确定的情况下,应该怎么改第三列的列名呢?试了用元编程来改,结果也不太对
image.png
代码如下:

sql(select = (sqlCol(`date_array),sqlCol(`date_array_p),sqlColAlias(<colNames(tmp_cur_col_table)[2]>, `value)), from = tmp_cur_col_table).eval()

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

直接使用rename!函数来修改一个table的列名

t.rename!(data_arraydata_array_p`myname)


与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...